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Finding the Fourth Proportional to 1,234.92, 1,851.73 and 412.90

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Solution

The fourth proportional to 1,234.92, 1,851.73 and 412.90 is: 619.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,234.92 : 1,851.73 = 412.90 : x
  2. Step 2: Convert to fraction form
    1,234.92/1,851.73 = 412.90/x
  3. Step 3: Cross multiply
    1,234.92x = 1,851.73 × 412.90
  4. Step 4: Simplify right side
    1,234.92x = 764,579.32
  5. Step 5: Solve for x
    x = 764,579.32/1,234.92
  6. Step 6: Final answer
    x = 619.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.